i think the key element to stop this things is following stoploss.
As only on hope nither the mkt will go as per investor and nither the stk will run as the investor thinks.
So very imp is to follow stoploss as it gives us little loss , but at the same time it gives us chance to enter in lower levels which can recover the loss and earn good.
only invest whatever you can afford to loose, peoples getting money on loans n investing in stock mkt and then they dont have any source to repay it . . .
stay away from stock mkt if you dont have extra money . . .
reason is investors dont stick to cash they are using margin and make loss,
to recover they again borrow money and again they incur loss out of that.
after doing this continously they dont have any other option other than this for which their family also suffers without any fault.